Revert "tmp: disable all workflows but integration tests while isolating issues"

This reverts commit aeeb5ae.

Author: thlorenz

.github/workflows/ci-fmt.yml

@@ -1,6 +1,9 @@
 on:
   push:
     branches: [master]
+  pull_request:
+    branches: ["*"]
+    types: [opened, reopened, synchronize, ready_for_review]
 
 name: Run CI - Format
 

.github/workflows/ci-lint.yml

@@ -1,6 +1,9 @@
 on:
   push:
     branches: [master]
+  pull_request:
+    branches: ["*"]
+    types: [opened, reopened, synchronize, ready_for_review]
 
 name: Run CI - Lint
 

.github/workflows/ci-test-unit.yml

@@ -1,6 +1,9 @@
 on:
   push:
     branches: [master]
+  pull_request:
+    branches: ["*"]
+    types: [opened, reopened, synchronize, ready_for_review]
 
 name: Run CI - Unit Tests